Definitions

1. noun

a unit of frequency equal to one billion hertz

“The new processor operates at 2.5 gigaherz.”

2. noun

a unit of frequency equal to one billion cycles per second

“The computer’s central processing unit ran at 3.2 gigaherz.”

3. noun

a unit of frequency equal to one billion hertz, used to measure the frequency of a clock signal or a processor

“The graphics card operates at 4.5 gigaherz.”